Much of his work in the late 1990s and early 2000s was in Denmark. In about 2005 his resumé began to be filled with jobs on British television. During the 2005-2006 season, for example, he was the director of photography on a long run of episodes of Doctors. The next year he worked on Bad Girls. In 2007 he began to work on a number of shows that Toby Haynes also had worked on — Coming Up, M.I. High, and Holby Blue — though they only worked together on M.I. High. He also began a three-year stint on Holby City. Like Haynes, then, he had a fairly extensive relationship with Kudos Film and Television — the same production company for which Piers Wenger and Beth Willis worked while making programmes in the Life on Mars franchise. In 2009, Pehrsson was the cinematographer on a few episodes of Hustle. Immediately prior to his work on the series 5Doctor Who finalé, he re-teamed with Haynes on Five Days, starring David Morrissey.